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v4l2: remove unused function

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This commit is contained in:
Wim Taymans 2012-04-23 13:32:48 +02:00
parent 933986fccc
commit 37e7a41771
1 changed files with 0 additions and 116 deletions
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116
sys/v4l2/v4l2src_calls.c
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@ -86,122 +86,6 @@ queue_failed:
}
}
/******************************************************
* gst_v4l2src_grab_frame ():
* grab a frame for capturing
* return value: GST_FLOW_OK, GST_FLOW_WRONG_STATE or GST_FLOW_ERROR
******************************************************/
GstFlowReturn
gst_v4l2src_grab_frame (GstV4l2Src * v4l2src, GstBuffer ** buf)
{
#define NUM_TRIALS 50
GstV4l2Object *v4l2object;
GstV4l2BufferPool *pool;
gint32 trials = NUM_TRIALS;
GstBuffer *pool_buffer;
gboolean need_copy;
gint ret;
v4l2object = v4l2src->v4l2object;
pool = v4l2src->pool;
if (!pool)
goto no_buffer_pool;
GST_DEBUG_OBJECT (v4l2src, "grab frame");
for (;;) {
if (v4l2object->can_poll_device) {
ret = gst_poll_wait (v4l2object->poll, GST_CLOCK_TIME_NONE);
if (G_UNLIKELY (ret < 0)) {
if (errno == EBUSY)
goto stopped;
if (errno == ENXIO) {
GST_DEBUG_OBJECT (v4l2src,
"v4l2 device doesn't support polling. Disabling");
v4l2object->can_poll_device = FALSE;
} else {
if (errno != EAGAIN && errno != EINTR)
goto select_error;
}
}
}
pool_buffer = GST_BUFFER (gst_v4l2_buffer_pool_dqbuf (pool));
if (pool_buffer)
break;
GST_WARNING_OBJECT (pool->v4l2elem, "trials=%d", trials);
/* if the sync() got interrupted, we can retry */
switch (errno) {
case EINVAL:
case ENOMEM:
/* fatal */
return GST_FLOW_ERROR;
case EAGAIN:
case EIO:
case EINTR:
default:
/* try again, until too many trials */
break;
}
/* check nr. of attempts to capture */
if (--trials == -1) {
goto too_many_trials;
}
}
/* if we are handing out the last buffer in the pool, we need to make a
* copy and bring the buffer back in the pool. */
need_copy = v4l2src->always_copy
|| !gst_v4l2_buffer_pool_available_buffers (pool);
if (G_UNLIKELY (need_copy)) {
if (!v4l2src->always_copy) {
GST_CAT_LOG_OBJECT (GST_CAT_PERFORMANCE, v4l2src,
"running out of buffers, making a copy to reuse current one");
}
*buf = gst_buffer_copy (pool_buffer);
GST_BUFFER_FLAG_UNSET (*buf, GST_BUFFER_FLAG_READONLY);
/* this will requeue */
gst_buffer_unref (pool_buffer);
} else {
*buf = pool_buffer;
}
/* we set the buffer metadata in gst_v4l2src_create() */
return GST_FLOW_OK;
/* ERRORS */
no_buffer_pool:
{
GST_DEBUG ("no buffer pool");
return GST_FLOW_WRONG_STATE;
}
select_error:
{
GST_ELEMENT_ERROR (pool->v4l2elem, RESOURCE, READ, (NULL),
("select error %d: %s (%d)", ret, g_strerror (errno), errno));
return GST_FLOW_ERROR;
}
stopped:
{
GST_DEBUG ("stop called");
return GST_FLOW_WRONG_STATE;
}
too_many_trials:
{
GST_ELEMENT_ERROR (pool->v4l2elem, RESOURCE, FAILED,
(_("Failed trying to get video frames from device '%s'."),
v4l2object->videodev),
(_("Failed after %d tries. device %s. system error: %s"),
NUM_TRIALS, v4l2object->videodev, g_strerror (errno)));
return GST_FLOW_ERROR;
}
}
/******************************************************
* gst_v4l2src_set_capture():
* set capture parameters